Sounds like the "old" night light implementation in gnome-settings- daemon is losing track of the gamma state. Perhaps the new implementation (where it was rewritten and moved into mutter for GNOME 43) will solve it?
** Tags added: focal -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1728342 Title: Some applications disable "Night Light" and it is not reenabled upon exiting application To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1728342/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs